edyuk

Edyuk is free, GPL'ed, fully-featured an highly flexible Integrated Developpment Environment written in C++ using the Qt 4 toolkit. It's primary goal is to provide an easy to use and complete developpment platform for C++ developpment, particularly in combination with the Qt 4 toolkit. However, thanks to its plugin-oriented architecture and its dynamic perspective-based GUI, it can easily be extended to support other programming languages, build systems, debuggers, GUI toolkits, ...

Godot Engine

Godot is a fully featured, open source, MIT licensed, game engine. It focuses on having great tools, and a visual oriented workflow that can export to PC, Mobile and Web platforms with no hassle. The editor, language and APIs are feature rich, yet simple to learn, allowing you to become productive in a matter of hours.

Jas CMS

Jas CMS is a free, small website engine written in Java. It can produce static content without the need of any databases or server-side scripting languages. Jas CMS is created to fulfil high security concerns.